`timescale 1ns/1ns module main_mod( input clk, input rst_n, input [7:0]a, input [7:0]b, input [7:0]c, output [7:0]d ); wire [7:0] c_temp; reg [7:0] c_reg; always @(posedge clk or negedge rst_n) if(!rst_n) c_reg <= 8'd0; else c_reg <= c; sub_mod sub_mod_0 (clk, rst_n, a, b, c_t...